package cn.modoumama.common.utils;


import java.security.MessageDigest;

import org.apache.commons.codec.binary.Base64;

/**
 * 小加解密类，主要是BASE64的加解密
 *
 */
public class Code {   
    public static final String KEY_SHA = "SHA";   
    public static final String KEY_MD5 = "MD5";   
   
    /**  
     * BASE64解密  
     *   
     * @param key  
     * @return  
     * @throws Exception  
     */ 
    public static byte[] decryptBASE64(String key) throws Exception {
        return Base64.decodeBase64(key);
    }
   
    /**  
     * BASE64加密  
     *   
     * @param key  
     * @return  
     * @throws Exception  
     */ 
    public static String encryptBASE64(byte[] key) throws Exception {
        return Base64.encodeBase64String(key);
    }
   
    /**  
     * MD5加密  
     *   
     * @param data  
     * @return  
     * @throws Exception  
     */ 
    public static byte[] encryptMD5(byte[] data) throws Exception {   
   
        MessageDigest md5 = MessageDigest.getInstance(KEY_MD5);   
        md5.update(data);   
   
        return md5.digest();   
   
    }   
   
    /**  
     * SHA加密  
     *   
     * @param data  
     * @return  
     * @throws Exception  
     */ 
    public static byte[] encryptSHA(byte[] data) throws Exception {   
   
        MessageDigest sha = MessageDigest.getInstance(KEY_SHA);   
        sha.update(data);   
   
        return sha.digest();   
   
    }   
}